/Engine/Source/Editor/UnrealEd/Classes/Editor/UnrealEdEngine.h
Gets the canonical list of map templates that should be visible in new level picker. This function calls OnGetTemplateMapInfos to allow runtime override of the default maps
const [TArray](API\Runtime\Core\Containers\TArray)< [FTemplateMapInfo](API\Editor\UnrealEd\Editor\FTemplateMapInfo) > & GetTemplateMapInfos() const